Add JSONP view of accessible services (fixes #7624)

src/authentic2_pratic/urls.py

@@ -50,4 +50,5 @@ urlpatterns = patterns('',
         url('^manage/collectivities/add/$', views.collectivity_add, name='a2-pratic-collectivity-add'),
         url('^manage/collectivities/(?P<collectivity_pk>\d+)/', include(collectivity_urlpatterns)),
         url('^$', views.agent_homepage, name='auth_homepage'),
+        url('^services.json$', views.agent_homepage_jsonp, name='auth_homepage_jsonp'),
 )

src/authentic2_pratic/views.py

@@ -1,5 +1,6 @@
+import json
 from django.utils.translation import ugettext_lazy as _
-from django.http import HttpResponseRedirect
+from django.http import HttpResponseRedirect, HttpResponse
 from django.shortcuts import get_object_or_404, redirect, render
 from django.contrib import messages
 from django.contrib.auth.views import redirect_to_login
@@ -398,3 +399,22 @@ def get_service_links(request):
 def agent_homepage(request):
     ctx = {'service_links': get_service_links(request)}
     return render(request, 'authentic2_pratic/agent_homepage.html', ctx)
+
+def agent_homepage_jsonp(request):
+    service_links = get_service_links(request)
+    data = []
+    for name, url, slug, needed_authent in service_links:
+        data.append({
+            'url': url,
+            'label': name,
+            'authentication_level_is_enough': not bool(needed_authent),
+            'authentication_levels': filter(None, needed_authent.split(', ')),
+        })
+    response = HttpResponse(content_type='application/json')
+    json_str = json.dumps(data)
+    for variable in ('jsonpCallback', 'callback'):
+        if variable in request.GET:
+            json_str = '%s(%s);' % (request.GET[variable], json_str)
+            break
+    response.write(json_str)
+    return response